kubernetes（K8s）05-KubeAdm自动化安装一键部署（附一键脚本）
我的机器配置：
| IP地址 |
节点角色 |
CPU |
Memory |
Hostname |
磁盘 |
| 192.168.25.150 |
master |
>=2c |
>=2G |
master |
sda、sdb |
| 192.168.25.151 |
worker |
>=2c |
>=2G |
node1 |
sda、sdb |
| 192.168.25.152 |
worker |
>=2c |
>=2G |
node2 |
sda、sdb |
PS:机器内存必须大于2G 否则报错
一、每个节点先执行公共脚本
每个节点先设置名称
hostnamectl set-hostname master
下面是一键脚本(注意hosts里面要写每个node的ip)
可以写到一个文件里面批量执行
cat <>/etc/hosts
192.168.25.150 master
192.168.25.151 node1
192.168.25.152 node2
EOF
systemctl stop firewalld
systemctl disable firewalld
setenforce 0
sed -i "s/^SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config
swapoff -a
sed -i 's/.*swap.*/#&/' /etc/fstab
cat > /etc/sysctl.d/k8s.conf < /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo
yum install -y docker-ce-18.06.1.ce-3.el7
systemctl enable docker && systemctl start docker
docker –version
docker version 18.06.1-ce, build e68fc7a
yum install -y kubelet kubeadm kubectl
systemctl enable kubelet
二、部署Master节点
1、kubeadm 执行安装（注意前面yum安装的版本 在最后安装完成后有log打印 版本千万要对上 不然重来）
kubeadm init --kubernetes-version=1.15.0 --apiserver-advertise-address=192.168.25.150 --image-repository registry.aliyuncs.com/google_containers --service-cidr=10.1.0.0/16 --pod-network-cidr=10.244.0.0/16
Ps:注意前一步yum安装的 kubelet kubeadm kubectl 的版本
集群初始化成功后返回如下信息：
kubeadm join 192.168.25.150:6443 --token v0h9d5.y6ryogyngkjv8463 --discovery-token-ca-cert-hash sha256:ec13b19b3b97fa8cf308e9a7e744a639f1ab4bc124b692931934ad6b9cf747f2记录生成的最后部分内容，此内容需要在其它节点加入Kubernetes集群时执行。
2、配置kubectl
mkdir -p /root/.kube
cp /etc/kubernetes/admin.conf /root/.kube/config
kubectl get nodes
kubectl get cs
3.部署flannel网络
kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/a70459be0084506e4ec919aa1c114638878db11b/Documentation/kube-flannel.yml
#到这里 可以先让node加入集群
----------------------------
4、部署Dashboard
// 获取yaml文件
wget https://raw.githubusercontent.com/kubernetes/dashboard/v1.10.1/src/deploy/recommended/kubernetes-dashboard.yaml
// 向文件追加nodeport等
sed -i 's/k8s.gcr.io/loveone/g' kubernetes-dashboard.yaml
sed -i '/targetPort:/a\ \ \ \ \ \ nodePort: 30001\n\ \ type: NodePort' kubernetes-dashboard.yaml
// 创建pod和svc
kubectl create -f kubernetes-dashboard.yaml
// 检查状态
kubectl get deployment kubernetes-dashboard -n kube-system
kubectl get pods -n kube-system -o wide
kubectl get services -n kube-system
netstat -ntlp|grep 30001
在Firefox浏览器输入Dashboard访问地址：https://192.168.25.150:30001（Chrome玩不了）
// 查看访问Dashboard的认证令牌
kubectl create serviceaccount dashboard-admin -n kube-system
kubectl create clusterrolebinding dashboard-admin --clusterrole=cluster-admin --serviceaccount=kube-system:dashboard-admin
kubectl describe secrets -n kube-system $(kubectl -n kube-system get secret | awk '/dashboard-admin/{print $1}')
#下面是登陆dashboard的令牌
eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.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.b6fu2KxfJi7vTR7rUL5qOY_M3HJuCMaaAdcFioLqF9AoBg8bdy1OgGcv2PCNa-06KVip1pOz8-EsiNE81wI2pELfLu47eCTtqfLQSi_MF1LYm5jD5JLO0Cym5Vohf_cTi0DCOJZnO4TbWAxAxYb5xw6_TySbnOOvyrB6CVR_IWUZukLquHoF1s7Xg3km5NU8XOP973IOYpGnYGkXHT9aMHEUOfWxKfQ8LRgIvlvs2fwxeY7UNxajUVKlIEYNLP-zxU1FB7ZHySMUj-t6wMXU-91LY7BOEASnu8ad2PUs5a5BZA7CtriMXmJGGkStvlaW5Isc7kIKyoEgQTXLH4enTQ
三、部署Node节点
#只需加入集群即可
kubeadm join 192.168.25.150:6443 --token v0h9d5.y6ryogyngkjv8463 --discovery-token-ca-cert-hash sha256:ec13b19b3b97fa8cf308e9a7e744a639f1ab4bc124b692931934ad6b9cf747f2
安装完成：
master节点 kubectl get nodes查看即可
PS:
- CPU最少2H 内存最少2G 不然kubeadm会报错
- 如果部署失败，可以执行kubeadm reset清理环境
- 确定集群至少有一台cluster，并且可以正常通信，不然kubeadm会报错
整理自：https://www.kubernetes.org.cn/5462.html